Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kabushiki Kaisha

Ngk Spark Plug Company, Limited

Aichi Steel Works, Ltd.

Akio Itoh

Tatsumi Hioki

Shoji Noda

Yoshinobu Honkura

Osami Kamigaito

Haruo Doi

Masakazu Aoki

Hideo Sobue

Katsushi Saito

Kazuo Higuchi

Kiyoshi Uchida

Shin-ichi Towata

Junichi Kawamoto

Shun-ichi Murasaki

Sigeo Saitoh

Kazunori Sumi

Mitsutaka Kakeno

Akihiko Koiwai

Toshihiro Mouri

Mikio Niimi

A multilayered hydrogen absorbing body is provided which is formed by laminating at least two types of hydrogen absorbing materials. The degrees of strains cause due to absorption/desorption of hydrogen are different between the hydrogen absorbing materials adjacent to each other.

Multilayered hydrogen absorbing body

A thin film layered member having high heat dissipation efficiency is composed of at least two diamond layers and at least one interlayer. The diamond layers and the interlayer ape alternately laminated and the diamond layers form outer surfaces of the thin film layered member. When this member is applied to a heatsink or the like, thermal stress to an element mounted thereon can be reduced because of a laminated structure comprising an interlayer having a high coefficient of thermal expansion and diamond layers having a low coefficient of thermal expansion. Further, the interlayer includes a carbide forming metal, which reacts with carbon atoms constituting a diamond in a laminating process and to form a carbide at an interface between the interlayer and the diamond layer, thereby realizing strong bonding therebetween.

Thin film layered member

In a process for forming a solid lubricating film on an iron-base substrate, an organic material having a vapor pressure of 10.sup.-4 Torr or less at room temperature is deposited on an iron-base alloy substrate in a vacuum atmosphere in a vacuum degree of 10.sup.-4 Torr or more, and simultaneously ions of a metal element having a chemical affinity to carbon is irradiated on the iron-base alloy substrate at a dose of 1.times.10.sup.16 ions/cm.sup.2 or more, the ions having an energy of 5 keV or more. Accordingly, the iron-base substrate is coated with a solid lubricating film which includes an atom mixture layer including carbide of the metal element and alloy of iron and the metal element and a carbon layer including amorphous carbon. Hence, the solid lubricating film has an excellent lubricating property as well as a high adhesion property to the iron-base substrate. Namely, the excellent lubricating property will last for a long period of time.

Process for forming solid lubricating film on iron-base alloy substrate

Piezoelectric type liquid level sensor for detecting whether the level of various liquids such as oil of an internal combustion engine, a generator or the like is a predetermined value or higher or not, and method of making the sensor. The sensor is arranged to eliminate the influence of the weight of the lead wires on the vibration element and to facilitate its assembly. The sensor may be provided with a damper member for increasing the sensitivity.

Piezoelectric type liquid level sensor and fabricating method thereof

A method of strengthening ceramic material by forming a metal film on the surface of the ceramic material and irradiating ions of high energy on the surface of the film. For further improvement, the material may be heat treated at a temperature of 600.degree. C. to 1600.degree. C. after the ion irradiation.

Method of strengthening ceramics

Growing community of inventors

Nagoya, Japan

Akio Itoh